DOI: 10.36347/sjds.2021.v08i06.002

Pages: 170-175

Introduction: The contour of artificial crowns has and continues to be highly controversial. Much of the controversy centers on whether the gingival sulcus is really in need of protection from buccal and/or lingual convexities, or whether a flatter emergence profile affords "self-cleansing" muscle action. Evidence is reviewed in this part which suggests that over-contoured crown is probably more detrimental to gingival health than under-contoured crown. Objective: The purpose of this study was to evaluate the effects of modified crown contour (over-contoured and under-contoured) on periodontal health. Methods: This study was conducted in the department of Prosthodontics, Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh for the duration of one and half year to find out the successful artificial crown contour that is harmonious with the periodontium. Selected mandibular molar teeth were prepared for full veneer crown. 50 patients (Group-A) whose full veneer crown was fabricated with under-contouring form and another 50 patients (Group-B) whose full veneer crown was fabricated with over-contouring form and cemented on respected teeth. Clinical examination and evaluation were done after three (3) weeks, six (6) weeks, three (3) months, and six (6) months of post prosthesis follow up period. Data were collected on the basis of following parameters like gingival index, periodontal index, periodontal pocket depth, and gingival recession in a predesign data collection sheet. Statistical analysis (Chi- Square Test and unpaired t-test) was done to find out the significance value (P<0.05). Results: It is observed that the result was highly significant (p<.001) between two groups regarding Gingival index and Periodontal index but not significantly difference regarding Periodontal pocket depth or Gingival recession. Conclusion: This study revealed that under-contoured restoration does not produce any significant changes in the health of gingiva but over-.......